te::da::Expression Class Reference

This is an abstract class that models a query expression. More...

#include <Expression.h>

Inheritance diagram for te::da::Expression:

Public Types
typedef void	ReturnType
typedef QueryVisitor	VisitorType

Public Member Functions
virtual ReturnType	accept (VisitorType &guest) const =0
	It call the visit method from the guest object. More...
virtual Expression *	clone () const =0
	It creates a new copy of this expression. More...
TE_DEFINE_VISITABLE	Expression ()
	Default constructor. More...
virtual	~Expression ()
	Virtual destructor. More...

Detailed Description

This is an abstract class that models a query expression.

An expression is a combination of one or more functions, literals or property names that can be evaluated.

See Also

PropertyName, Function, Literal

Definition at line 47 of file Expression.h.

Member Typedef Documentation

typedef void te::common::BaseVisitable< QueryVisitor , void >::ReturnType

inherited

Definition at line 58 of file BaseVisitable.h.

typedef QueryVisitor te::common::BaseVisitable< QueryVisitor , void >::VisitorType

inherited

Definition at line 57 of file BaseVisitable.h.

Constructor & Destructor Documentation

TE_DEFINE_VISITABLE te::da::Expression::Expression ( )

inline

Default constructor.

Definition at line 54 of file Expression.h.

virtual te::da::Expression::~Expression ( )

inlinevirtual

Virtual destructor.

Definition at line 57 of file Expression.h.

Member Function Documentation

virtual ReturnType te::common::BaseVisitable< QueryVisitor , void >::accept ( VisitorType &  guest ) const

pure virtualinherited

It call the visit method from the guest object.

Parameters

guest

The guest or visitor.

Returns

Any valid value define by the template type R.

virtual Expression* te::da::Expression::clone ( ) const

pure virtual

It creates a new copy of this expression.

Implemented in te::da::ST_Buffer, te::da::In, te::da::ST_DistanceBuffer, te::da::ST_Relate, te::da::LiteralEnvelope, te::da::Literal, te::da::LessThanOrEqualTo, te::da::ST_Contains, te::da::BinaryOp, te::da::ST_Beyond, te::da::ST_DWithin, te::da::Add, te::da::And, te::da::Div, te::da::EqualTo, te::da::GreaterThan, te::da::GreaterThanOrEqualTo, te::da::LessThan, te::da::LiteralByteArray, te::da::LiteralDateTime, te::da::LiteralDouble, te::da::Mul, te::da::Not, te::da::NotEqualTo, te::da::Or, te::da::ST_Crosses, te::da::ST_Difference, te::da::ST_Disjoint, te::da::ST_EnvelopeIntersects, te::da::ST_Equals, te::da::ST_Intersection, te::da::ST_Intersects, te::da::ST_Overlaps, te::da::ST_Touches, te::da::ST_Transform, te::da::ST_Within, te::da::Sub, te::da::BinaryFunction, te::da::Avg, te::da::Count, te::da::IsNull, te::da::LiteralGeom, te::da::Max, te::da::Min, te::da::ST_Union, te::da::StdDev, te::da::Sum, te::da::Variance, te::da::Like, te::da::UnaryFunction, te::da::UnaryOp, te::da::PropertyName, te::da::Function, te::da::LiteralInt16, te::da::LiteralInt32, te::da::LiteralInt64, te::da::LiteralString, and te::da::Substring.

Referenced by te::da::BinaryFunction::BinaryFunction(), te::da::Select::distinct(), te::map::QueryLayer::getData(), te::qt::widgets::WhereClauseWidget::getWhere(), te::da::Select::having(), te::da::JoinConditionOn::JoinConditionOn(), te::da::Like::Like(), te::da::new_clone(), te::qt::widgets::QueryDialog::onApplyPushButtonClicked(), operator!=(), operator&&(), operator<(), operator<=(), operator==(), operator>(), operator>=(), operator||(), operator~(), te::serialize::xml::Save(), te::da::ST_Buffer::ST_Buffer(), te::da::ST_DistanceBuffer::ST_DistanceBuffer(), te::da::ST_Relate::ST_Relate(), te::da::ST_Transform::ST_Transform(), te::da::UnaryFunction::UnaryFunction(), and te::da::Select::where().

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The documentation for this class was generated from the following file:

• /home/castejon/castejon_files/develop/terralib5/git/src/terralib/dataaccess/query/Expression.h